Re: Heads up

From: Alfred Perlstein <bright_at_mu.org>
Date: Thu, 14 Apr 2016 18:22:25 -0700
On 4/14/16 3:42 PM, Warner Losh wrote:
> The CAM I/O scheduler has been committed to current. This work is described
> in https://people.freebsd.org/~imp/bsdcan2015/iosched-v3.pdf though the
> default scheduler doesn't change the default (old) behavior.
>
> One possible issue, however, is that it also enables NCQ Trims on ada SSDs.
> There are a few rogue drives that claim support for this feature, but
> actually implement data corrupt instead of queued trims. The list of known
> rogues is believed to be complete, but some caution is in order.
>
Yowch...

With data at stake wouldn't a whitelist be better along with a tool for 
testing it?

Example, you have whitelist and blacklist, if the device isn't on either 
list you output a kernel message and suggest they run a tool to "test" 
the controller and report back the findings?

-Alfred
Received on Thu Apr 14 2016 - 23:22:34 UTC

This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:41:04 UTC